Stuck Pixel Test
Use rapidly selectable solid colors to distinguish a pixel that is permanently dark from a subpixel that remains stuck on one color.
Repeated color changes reveal whether a suspicious point responds normally, remains dark, or stays illuminated in a fixed color. Confirm the location on red, green, blue, white, and black patterns; do not press the panel or run unsafe flashing tools.
What does this test measure?
Repeated color changes reveal whether a suspicious point responds normally, remains dark, or stays illuminated in a fixed color.
Why is this test important?
Use rapidly selectable solid colors to distinguish a pixel that is permanently dark from a subpixel that remains stuck on one color.
How do you run the test?
Confirm the location on red, green, blue, white, and black patterns; do not press the panel or run unsafe flashing tools.
How should results be interpreted?
A fixed colored point may be stuck, while a consistently dark point may be inactive; dirt or scaling can imitate both conditions.
Normal and problematic results
A fixed colored point may be stuck, while a consistently dark point may be inactive; dirt or scaling can imitate both conditions.
Technical limitations
A web test cannot repair a pixel, guarantee recovery, or determine warranty eligibility.
Why can the score decrease?
Unstable measurements, denied permissions, unsupported browser APIs, background load, power saving, or an incomplete test can affect the result. When a score changes, the result screen explains the reason.
What should you do if a problem is found?
Power-cycle the display, retest at native resolution and another input, and follow only manufacturer-approved support steps.
Example Result Explanation
Frequently Asked Questions
How is a stuck pixel different from a dead one?
A stuck pixel still receives power but is frozen on one colour, so it appears as a constant red, green or blue dot. A dead pixel receives nothing and stays black. Stuck pixels sometimes recover, dead pixels do not.
How long should I run the recovery pattern?
Twenty to thirty minutes is a reasonable attempt, and some people repeat it over a few days. If nothing has changed after several sessions, further running is unlikely to help.
Should I press on the screen to free a stuck pixel?
It is often suggested and it is risky. Pressure can damage the panel permanently and may void the warranty, which is a poor trade for one pixel. The colour-cycling approach carries no such risk.